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<title>第三章实训</title>
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<div id="content">
<h1 class="title">第三章实训</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#sec-1">1. 新浪微博登录界面设计</a>
<ul>
<li><a href="#sec-1-1">1.1. 实践步骤</a></li>
<li><a href="#sec-1-2">1.2. 效果图</a></li>
</ul>
</li>
<li><a href="#sec-2">2. 使用断点Debug跟踪Activity带值返回</a>
<ul>
<li><a href="#sec-2-1">2.1. 实践步骤</a></li>
<li><a href="#sec-2-2">2.2. 关键代码</a></li>
<li><a href="#sec-2-3">2.3. 效果图</a></li>
</ul>
</li>
</ul>
</div>
</div>

<div id="outline-container-sec-1" class="outline-2">
<h2 id="sec-1"><span class="section-number-2">1</span> 新浪微博登录界面设计</h2>
<div class="outline-text-2" id="text-1">
</div><div id="outline-container-sec-1-1" class="outline-3">
<h3 id="sec-1-1"><span class="section-number-3">1.1</span> 实践步骤</h3>
<div class="outline-text-3" id="text-1-1">
<ol class="org-ol">
<li>新建一个工程Sinlang,选择不创建Activity
</li>
<li>创建布局文件activity_main.xml
</li>
<li>将activity设置为垂直类型的线性布局
</li>
<li>添加两个TextView组件和EditText组件并设置成登录名和密码样式
</li>
<li>添加一个嵌套的水平类型的线性布局，并在布局中添加两个按钮"注册"和"登录"   
</li>
<li>添加ListView组件并从数组资源获取数据显示   
</li>
</ol>
</div>
</div>

<div id="outline-container-sec-1-2" class="outline-3">
<h3 id="sec-1-2"><span class="section-number-3">1.2</span> 效果图</h3>
<div class="outline-text-3" id="text-1-2">

<div class="figure">
<p><img src="img/singlang.jpg" alt="singlang.jpg" />
</p>
</div>
</div>
</div>
</div>
<div id="outline-container-sec-2" class="outline-2">
<h2 id="sec-2"><span class="section-number-2">2</span> 使用断点Debug跟踪Activity带值返回</h2>
<div class="outline-text-2" id="text-2">
</div><div id="outline-container-sec-2-1" class="outline-3">
<h3 id="sec-2-1"><span class="section-number-3">2.1</span> 实践步骤</h3>
<div class="outline-text-3" id="text-2-1">
<ol class="org-ol">
<li>在Android Studio中新建项目，将其命名为ex03_Valuejumptest。
</li>
<li>实现本项目的３个Activity和对应的布局文件，分别是主界面ActivityCommunication.java(对应的布局文件main.xml)、
第二个界面Subactivity1.java(对应的布局文件是subactivity1.xml)和第三个界面Subactivity2.java(对应布局文件是subactivity2.xml)
</li>
<li>修改AndroidManifest.xml文件，增加后两个Activity的声明。
</li>
<li>在需要观察的语句出增加断点，并进行Debug断点观察。
</li>
</ol>
</div>
</div>
<div id="outline-container-sec-2-2" class="outline-3">
<h3 id="sec-2-2"><span class="section-number-3">2.2</span> 关键代码</h3>
<div class="outline-text-3" id="text-2-2">
<ol class="org-ol">
<li>ActivityCommunication.java关键代码:
<div class="org-src-container">

<pre class="src src-java"><span style="color: #75715E;">//</span><span style="color: #747474;">&#21442;&#32771;&#35838;&#26412;p80&#39029;</span>
</pre>
</div>
</li>
<li>Subactivity1.java关键代码:
<div class="org-src-container">

<pre class="src src-java"><span style="color: #75715E;">//</span><span style="color: #747474;">&#21442;&#32771;&#35838;&#26412;p80&#39029;</span>
</pre>
</div>
</li>
</ol>
</div>
</div>
<div id="outline-container-sec-2-3" class="outline-3">
<h3 id="sec-2-3"><span class="section-number-3">2.3</span> 效果图</h3>
<div class="outline-text-3" id="text-2-3">

<div class="figure">
<p><img src="img/1.jpg" alt="1.jpg" />
</p>
</div>


<div class="figure">
<p><img src="img/2.jpg" alt="2.jpg" />
</p>
</div>


<div class="figure">
<p><img src="img/3.jpg" alt="3.jpg" />
</p>
</div>
</div>
</div>
</div>
</div>
<div id="postamble" class="status">
<p class="author">Author: jacklisp</p>
<p class="date">Created: 2019-09-11 三 11:40</p>
<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 25.2.2 (<a href="http://orgmode.org">Org</a> mode 8.2.10)</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
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